ICS9FG104D Datasheet, PDF (1/17 Pages) Integrated Device Technology – Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA

DATASHEET
Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
ICS9FG104D
Description
The ICS9FG104D is a Frequency Timing Generator that provides 4
differential output pairs that are compliant to the Intel CK410
specification. It also provides support for PCI-Express and SATA.
The part synthesizes several output frequencies from either a
14.31818 Mhz crystal or a 25 MHz crystal. The device can also be
driven by a reference input clock instead of a crystal. It provides
outputs with cycle-to-cycle jitter of less than 50 ps and output-to-
output skew of less than 35 ps. The ICS9FG104D also provides a
copy of the reference clock. Frequency selection can be
accomplished via strap pins or SMBus control.
Key Specifications
Features/Benefits
• Generates common frequencies from 14.318 MHz or
25 MHz
• Crystal or reference input
• 4 - 0.7V current-mode differential output pairs
• Supports Serial-ATA at 100 MHz
• Two spread spectrum modes: 0 to -0.5 downspread
and +/-0.25% centerspread
• Unused inputs may be disabled in either driven or Hi-Z
state for power management.
• Output cycle-to-cycle jitter < 50 ps
• Output to output skew < 35 ps
• +/-300 ppm frequency accuracy on output clocks
• +/-50 ppm at any frequency w/spread off
Functional Block Diagram
XIN/CLKIN
X2
2
OSC
PROGRAMMABLE
SPREAD PLL
STOP
4
LOGIC
REFOUT
DIF(3:0)
SPREAD
SEL14M_25M#
DIF_STOP#
FS(2:0)
SDATA
SCLK
CONTROL
LOGIC
IREF
IDT^® Frequency Generator for CPU, QPI, FBD, PCIe Gen 2 & SATA
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